(4) _Moral Teaching._ The ethical standard of every book in the Sunday-school library should be of the highest. Not that every paragraph should end with the application like the _Hæc fabula docet_ of Æsop's fables, or that the characters in a story should be of a "goody-goody" kind, or that none but good people should appear upon the page. There must be some shadows in the perspective that the light may stand in contrast. But in no case should wrong, or sin, or the doubtful moralities of modern society be made attractive. Moral problem stories, in which the boundary lines of right and wrong conduct are crossed and re-crossed until right seems wrong, and wrong seems right, should have no place. "Should love stories be admitted?" Not if the element of love enters as the dominant thought of the book. A story should not be forbidden because there is a pair of lovers in it; but it should not be accepted if the book shows no higher motive than to set forth their passion. Books should be sought that will inculcate a noble manliness for young men and a noble womanliness for young women, and there are such books in numbers sufficient to fill the library shelves. (5) _Christian Spirit._ It is not required that every book should set forth and illustrate a spiritual experience. It may be religious without preaching religion. But the morals it inculcates should be founded upon the gospels and inspired by faith. It should be reverent in its treatment of the Bible, of the church, and of the ministry. A book or a story designed to weaken belief in the Scriptures as records of the divine will, or holding the church up to scorn, or showing a minister as its villain, should be kept out of the Sunday-school library. Criticism or discussion of the Bible, of the church, and of the ministry has its place, but its place is not in the Sunday school. The Sunday school is distinctively a religious and a Christian institution, and the atmosphere of the Christian religion should pervade its library.